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notepad-plus-plus/lexilla/lexers/LexProgress.cxx

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// Scintilla source code edit control
/** @file LexProgress.cxx
** Lexer for Progress 4GL.
** Based on LexCPP.cxx of Neil Hodgson <neilh@scintilla.org>
**/
// Copyright 2006-2016 by Yuval Papish <Yuval@YuvCom.com>
// The License.txt file describes the conditions under which this software may be distributed.
/** TODO:
SpeedScript support in html lexer
Differentiate between labels and variables
Option 1: By symbols table
Option 2: As a single unidentified symbol in a sytactical line
**/
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <stdarg.h>
#include <assert.h>
#include <ctype.h>
#include <string>
#include <string_view>
#include <vector>
#include <map>
#include <algorithm>
#include <functional>
#include "ILexer.h"
#include "Scintilla.h"
#include "SciLexer.h"
#include "WordList.h"
#include "LexAccessor.h"
#include "StyleContext.h"
#include "CharacterSet.h"
#include "LexerModule.h"
#include "OptionSet.h"
#include "SparseState.h"
#include "DefaultLexer.h"
using namespace Scintilla;
using namespace Lexilla;
namespace {
// Use an unnamed namespace to protect the functions and classes from name conflicts
bool IsSpaceEquiv(int state) {
return (state == SCE_ABL_COMMENT ||
state == SCE_ABL_LINECOMMENT ||
state == SCE_ABL_DEFAULT);
}
void highlightTaskMarker(StyleContext &sc, LexAccessor &styler, WordList &markerList){
if ((isoperator(sc.chPrev) || IsASpace(sc.chPrev)) && markerList.Length()) {
const int lengthMarker = 50;
char marker[lengthMarker+1];
Sci_Position currPos = (Sci_Position) sc.currentPos;
Sci_Position i = 0;
while (i < lengthMarker) {
char ch = styler.SafeGetCharAt(currPos + i);
if (IsASpace(ch) || isoperator(ch)) {
break;
}
marker[i] = ch;
i++;
}
marker[i] = '\0';
if (markerList.InListAbbreviated (marker,'(')) {
sc.SetState(SCE_ABL_TASKMARKER);
}
}
}
bool IsStreamCommentStyle(int style) {
return style == SCE_ABL_COMMENT;
// style == SCE_ABL_LINECOMMENT; Only block comments are used for folding
}
// Options used for LexerABL
struct OptionsABL {
bool fold;
bool foldSyntaxBased;
bool foldComment;
bool foldCommentMultiline;
bool foldCompact;
OptionsABL() {
fold = false;
foldSyntaxBased = true;
foldComment = true;
foldCommentMultiline = true;
foldCompact = false;
}
};
const char *const ablWordLists[] = {
"Primary keywords and identifiers",
"Keywords that opens a block, only when used to begin a syntactic line",
"Keywords that opens a block anywhere in a syntactic line",
"Task Marker", /* "END MODIFY START TODO" */
0,
};
struct OptionSetABL : public OptionSet<OptionsABL> {
OptionSetABL() {
DefineProperty("fold", &OptionsABL::fold);
DefineProperty("fold.abl.syntax.based", &OptionsABL::foldSyntaxBased,
"Set this property to 0 to disable syntax based folding.");
DefineProperty("fold.comment", &OptionsABL::foldComment,
"This option enables folding multi-line comments and explicit fold points when using the ABL lexer. ");
DefineProperty("fold.abl.comment.multiline", &OptionsABL::foldCommentMultiline,
"Set this property to 0 to disable folding multi-line comments when fold.comment=1.");
DefineProperty("fold.compact", &OptionsABL::foldCompact);
DefineWordListSets(ablWordLists);
}
};
}
class LexerABL : public DefaultLexer {
CharacterSet setWord;
CharacterSet setNegationOp;
CharacterSet setArithmethicOp;
CharacterSet setRelOp;
CharacterSet setLogicalOp;
CharacterSet setWordStart;
WordList keywords1; // regular keywords
WordList keywords2; // block opening keywords, only when isSentenceStart
WordList keywords3; // block opening keywords
WordList keywords4; // Task Marker
OptionsABL options;
OptionSetABL osABL;
public:
LexerABL() :
DefaultLexer("abl", SCLEX_PROGRESS),
setWord(CharacterSet::setAlphaNum, "_", 0x80, true),
setNegationOp(CharacterSet::setNone, "!"),
setArithmethicOp(CharacterSet::setNone, "+-/*%"),
setRelOp(CharacterSet::setNone, "=!<>"),
setLogicalOp(CharacterSet::setNone, "|&"){
}
virtual ~LexerABL() {
}
void SCI_METHOD Release() override {
delete this;
}
int SCI_METHOD Version() const override {
return lvRelease5;
}
const char * SCI_METHOD PropertyNames() override {
return osABL.PropertyNames();
}
int SCI_METHOD PropertyType(const char *name) override {
return osABL.PropertyType(name);
}
const char * SCI_METHOD DescribeProperty(const char *name) override {
return osABL.DescribeProperty(name);
}
Sci_Position SCI_METHOD PropertySet(const char *key, const char *val) override ;
const char * SCI_METHOD PropertyGet(const char *key) override {
return osABL.PropertyGet(key);
}
const char * SCI_METHOD DescribeWordListSets() override {
return osABL.DescribeWordListSets();
}
Sci_Position SCI_METHOD WordListSet(int n, const char *wl) override;
void SCI_METHOD Lex(Sci_PositionU startPos, Sci_Position length, int initStyle, IDocument *pAccess) override;
void SCI_METHOD Fold(Sci_PositionU startPos, Sci_Position length, int initStyle, IDocument *pAccess) override;
void * SCI_METHOD PrivateCall(int, void *) override {
return 0;
}
int SCI_METHOD LineEndTypesSupported() override {
return SC_LINE_END_TYPE_DEFAULT;
}
static ILexer5 *LexerFactoryABL() {
return new LexerABL();
}
};
Sci_Position SCI_METHOD LexerABL::PropertySet(const char *key, const char *val) {
if (osABL.PropertySet(&options, key, val)) {
return 0;
}
return -1;
}
Sci_Position SCI_METHOD LexerABL::WordListSet(int n, const char *wl) {
WordList *wordListN = 0;
switch (n) {
case 0:
wordListN = &keywords1;
break;
case 1:
wordListN = &keywords2;
break;
case 2:
wordListN = &keywords3;
break;
case 3:
wordListN = &keywords4;
break;
}
Sci_Position firstModification = -1;
if (wordListN) {
WordList wlNew;
wlNew.Set(wl);
if (*wordListN != wlNew) {
wordListN->Set(wl);
firstModification = 0;
}
}
return firstModification;
}
#if defined(__clang__)
#if __has_warning("-Wunused-but-set-variable")
// Disable warning for visibleChars
#pragma clang diagnostic ignored "-Wunused-but-set-variable"
#endif
#endif
void SCI_METHOD LexerABL::Lex(Sci_PositionU startPos, Sci_Position length, int initStyle, IDocument *pAccess) {
LexAccessor styler(pAccess);
setWordStart = CharacterSet(CharacterSet::setAlpha, "_", 0x80, true);
int visibleChars = 0;
int visibleChars1 = 0;
int styleBeforeTaskMarker = SCE_ABL_DEFAULT;
bool continuationLine = false;
int commentNestingLevel = 0;
bool isSentenceStart = true;
bool possibleOOLChange = false;
Sci_Position lineCurrent = styler.GetLine(startPos);
if (initStyle == SCE_ABL_PREPROCESSOR) {
// Set continuationLine if last character of previous line is '~'
if (lineCurrent > 0) {
Sci_Position endLinePrevious = styler.LineEnd(lineCurrent-1);
if (endLinePrevious > 0) {
continuationLine = styler.SafeGetCharAt(endLinePrevious-1) == '~';
}
}
}
// Look back to set variables that are actually invisible secondary states. The reason to avoid formal states is to cut down on state's bits
if (startPos > 0) {
Sci_Position back = startPos;
bool checkCommentNestingLevel = (initStyle == SCE_ABL_COMMENT);
bool checkIsSentenceStart = (initStyle == SCE_ABL_DEFAULT || initStyle == SCE_ABL_IDENTIFIER);
char ch;
char st;
char chPrev;
char chPrev_1;
char chPrev_2;
char chPrev_3;
while (back >= 0 && (checkCommentNestingLevel || checkIsSentenceStart)) {
ch = styler.SafeGetCharAt(back);
styler.Flush(); // looking at styles so need to flush
st = styler.StyleAt(back);
chPrev = styler.SafeGetCharAt(back-1);
// isSentenceStart is a non-visible state, used to identify where statements and preprocessor declerations can start
if (checkIsSentenceStart && st != SCE_ABL_COMMENT && st != SCE_ABL_LINECOMMENT && st != SCE_ABL_CHARACTER && st != SCE_ABL_STRING ) {
chPrev_1 = styler.SafeGetCharAt(back-2);
chPrev_2 = styler.SafeGetCharAt(back-3);
chPrev_3 = styler.SafeGetCharAt(back-4);
if ((chPrev == '.' || chPrev == ':' || chPrev == '}' ||
(chPrev_3 == 'e' && chPrev_2 == 'l' && chPrev_1 == 's' && chPrev == 'e') ||
(chPrev_3 == 't' && chPrev_2 == 'h' && chPrev_1 == 'e' && chPrev == 'n')) &&
(IsASpace(ch) || (ch == '/' && styler.SafeGetCharAt(back+1) == '*'))
) {
checkIsSentenceStart = false;
isSentenceStart = true;
}
else if (IsASpace(chPrev) && ch == '{') {
checkIsSentenceStart = false;
isSentenceStart = false;
}
}
// commentNestingLevel is a non-visible state, used to identify the nesting level of a comment
if (checkCommentNestingLevel) {
if (chPrev == '/' && ch == '*') {
commentNestingLevel++;
// eat the '/' so we don't miscount a */ if we see /*/*
--back;
}
if (chPrev == '*' && ch == '/') {
commentNestingLevel--;
// eat the '*' so we don't miscount a /* if we see */*/
--back;
}
}
--back;
}
}
StyleContext sc(startPos, length, initStyle, styler, static_cast<unsigned char>(0xff));
Sci_Position lineEndNext = styler.LineEnd(lineCurrent);
for (; sc.More();) {
if (sc.atLineStart) {
visibleChars = 0;
visibleChars1 = 0;
}
if (sc.atLineEnd) {
lineCurrent++;
lineEndNext = styler.LineEnd(lineCurrent);
}
// Handle line continuation generically.
if (sc.ch == '~') {
if (static_cast<Sci_Position>((sc.currentPos+1)) >= lineEndNext) {
lineCurrent++;
lineEndNext = styler.LineEnd(lineCurrent);
sc.Forward();
if (sc.ch == '\r' && sc.chNext == '\n') {
sc.Forward();
}
continuationLine = true;
sc.Forward();
continue;
}
}
const bool atLineEndBeforeSwitch = sc.atLineEnd;
// Determine if the current state should terminate.
switch (sc.state) {
case SCE_ABL_OPERATOR:
sc.SetState(SCE_ABL_DEFAULT);
break;
case SCE_ABL_NUMBER:
// We accept almost anything because of hex. and maybe number suffixes and scientific notations in the future
if (!(setWord.Contains(sc.ch)
|| ((sc.ch == '+' || sc.ch == '-') && (sc.chPrev == 'e' || sc.chPrev == 'E' ||
sc.chPrev == 'p' || sc.chPrev == 'P')))) {
sc.SetState(SCE_ABL_DEFAULT);
}
break;
case SCE_ABL_IDENTIFIER:
if (sc.atLineStart || sc.atLineEnd || (!setWord.Contains(sc.ch) && sc.ch != '-')) {
char s[1000];
sc.GetCurrentLowered(s, sizeof(s));
bool isLastWordEnd = (s[0] == 'e' && s[1] =='n' && s[2] == 'd' && !IsAlphaNumeric(s[3]) && s[3] != '-'); // helps to identify "end trigger" phrase
if ((isSentenceStart && keywords2.InListAbbreviated (s,'(')) || (!isLastWordEnd && keywords3.InListAbbreviated (s,'('))) {
sc.ChangeState(SCE_ABL_BLOCK);
isSentenceStart = false;
}
else if (keywords1.InListAbbreviated (s,'(')) {
if (isLastWordEnd ||
(s[0] == 'f' && s[1] =='o' && s[2] == 'r' && s[3] == 'w' && s[4] =='a' && s[5] == 'r' && s[6] == 'd'&& !IsAlphaNumeric(s[7]))) {
sc.ChangeState(SCE_ABL_END);
isSentenceStart = false;
}
else if ((s[0] == 'e' && s[1] =='l' && s[2] == 's' && s[3] == 'e') ||
(s[0] == 't' && s[1] =='h' && s[2] == 'e' && s[3] == 'n')) {
sc.ChangeState(SCE_ABL_WORD);
isSentenceStart = true;
}
else {
sc.ChangeState(SCE_ABL_WORD);
isSentenceStart = false;
}
}
sc.SetState(SCE_ABL_DEFAULT);
}
break;
case SCE_ABL_PREPROCESSOR:
if (sc.atLineStart && !continuationLine) {
sc.SetState(SCE_ABL_DEFAULT);
// Force Scintilla to acknowledge changed stated even though this change might happen outside of the current line
possibleOOLChange = true;
isSentenceStart = true;
}
break;
case SCE_ABL_LINECOMMENT:
if (sc.atLineStart && !continuationLine) {
sc.SetState(SCE_ABL_DEFAULT);
isSentenceStart = true;
} else {
styleBeforeTaskMarker = SCE_ABL_LINECOMMENT;
highlightTaskMarker(sc, styler, keywords4);
}
break;
case SCE_ABL_TASKMARKER:
if (isoperator(sc.ch) || IsASpace(sc.ch)) {
sc.SetState(styleBeforeTaskMarker);
styleBeforeTaskMarker = SCE_ABL_DEFAULT;
}
// fall through
case SCE_ABL_COMMENT:
if (sc.Match('*', '/')) {
sc.Forward();
commentNestingLevel--;
if (commentNestingLevel == 0) {
sc.ForwardSetState(SCE_ABL_DEFAULT);
possibleOOLChange = true;
}
} else if (sc.Match('/', '*')) {
commentNestingLevel++;
sc.Forward();
}
if (commentNestingLevel > 0) {
styleBeforeTaskMarker = SCE_ABL_COMMENT;
possibleOOLChange = true;
highlightTaskMarker(sc, styler, keywords4);
}
break;
case SCE_ABL_STRING:
if (sc.ch == '~') {
sc.Forward(); // Skip a character after a tilde
} else if (sc.ch == '\"') {
sc.ForwardSetState(SCE_ABL_DEFAULT);
}
break;
case SCE_ABL_CHARACTER:
if (sc.ch == '~') {
sc.Forward(); // Skip a character after a tilde
} else if (sc.ch == '\'') {
sc.ForwardSetState(SCE_ABL_DEFAULT);
}
break;
}
if (sc.atLineEnd && !atLineEndBeforeSwitch) {
// State exit processing consumed characters up to end of line.
lineCurrent++;
lineEndNext = styler.LineEnd(lineCurrent);
}
// Determine if a new state should be entered.
if (sc.state == SCE_ABL_DEFAULT) {
if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
sc.SetState(SCE_ABL_NUMBER);
isSentenceStart = false;
} else if (!sc.atLineEnd && (setWordStart.Contains(sc.ch)) && sc.chPrev != '&') {
sc.SetState(SCE_ABL_IDENTIFIER);
} else if (sc.Match('/', '*')) {
if (sc.chPrev == '.' || sc.chPrev == ':' || sc.chPrev == '}') {
isSentenceStart = true;
}
sc.SetState(SCE_ABL_COMMENT);
possibleOOLChange = true;
commentNestingLevel++;
sc.Forward(); // Eat the * so it isn't used for the end of the comment
} else if (sc.ch == '\"') {
sc.SetState(SCE_ABL_STRING);
isSentenceStart = false;
} else if (sc.ch == '\'') {
sc.SetState(SCE_ABL_CHARACTER);
isSentenceStart = false;
} else if (sc.ch == '&' && visibleChars1 == 0 && isSentenceStart) {
// Preprocessor commands are alone on their line
sc.SetState(SCE_ABL_PREPROCESSOR);
// Force Scintilla to acknowledge changed stated even though this change might happen outside of the current line
possibleOOLChange = true;
// Skip whitespace between & and preprocessor word
do {
sc.Forward();
} while ((sc.ch == ' ' || sc.ch == '\t') && sc.More());
if (sc.atLineEnd) {
sc.SetState(SCE_ABL_DEFAULT);
}
} else if (sc.Match('/','/') && (IsASpace(sc.chPrev) || isSentenceStart)) {
// Line comments are valid after a white space or EOL
sc.SetState(SCE_ABL_LINECOMMENT);
// Skip whitespace between // and preprocessor word
do {
sc.Forward();
} while ((sc.ch == ' ' || sc.ch == '\t') && sc.More());
if (sc.atLineEnd) {
sc.SetState(SCE_ABL_DEFAULT);
}
} else if (isoperator(sc.ch)) {
sc.SetState(SCE_ABL_OPERATOR);
/* This code allows highlight of handles. Alas, it would cause the phrase "last-event:function"
to be recognized as a BlockBegin */
isSentenceStart = false;
}
else if ((sc.chPrev == '.' || sc.chPrev == ':' || sc.chPrev == '}') && (IsASpace(sc.ch))) {
isSentenceStart = true;
}
}
if (!IsASpace(sc.ch)) {
visibleChars1++;
}
if (!IsASpace(sc.ch) && !IsSpaceEquiv(sc.state)) {
visibleChars++;
}
continuationLine = false;
sc.Forward();
}
if (possibleOOLChange)
styler.ChangeLexerState(startPos, startPos + length);
sc.Complete();
}
// Store both the current line's fold level and the next lines in the
// level store to make it easy to pick up with each increment
// and to make it possible to fiddle the current level for "} else {".
void SCI_METHOD LexerABL::Fold(Sci_PositionU startPos, Sci_Position length, int initStyle, IDocument *pAccess) {
if (!options.fold)
return;
LexAccessor styler(pAccess);
Sci_PositionU endPos = startPos + length;
int visibleChars = 0;
Sci_Position lineCurrent = styler.GetLine(startPos);
int levelCurrent = SC_FOLDLEVELBASE;
if (lineCurrent > 0)
levelCurrent = styler.LevelAt(lineCurrent-1) >> 16;
Sci_PositionU lineStartNext = styler.LineStart(lineCurrent+1);
int levelNext = levelCurrent;
char chNext = styler[startPos];
int styleNext = styler.StyleAt(startPos);
int style = initStyle;
for (Sci_PositionU i = startPos; i < endPos; i++) {
chNext = static_cast<char>(tolower(chNext)); // check tolower
char ch = chNext;
chNext = styler.SafeGetCharAt(i+1);
int stylePrev = style;
style = styleNext;
styleNext = styler.StyleAt(i+1);
bool atEOL = i == (lineStartNext-1);
if (options.foldComment && options.foldCommentMultiline && IsStreamCommentStyle(style)) {
if (!IsStreamCommentStyle(stylePrev)) {
levelNext++;
} else if (!IsStreamCommentStyle(styleNext) && !atEOL) {
// Comments don't end at end of line and the next character may be unstyled.
levelNext--;
}
}
if (options.foldSyntaxBased) {
if (style == SCE_ABL_BLOCK && !IsAlphaNumeric(chNext)) {
levelNext++;
}
else if (style == SCE_ABL_END && (ch == 'e' || ch == 'f')) {
levelNext--;
}
}
if (!IsASpace(ch))
visibleChars++;
if (atEOL || (i == endPos-1)) {
int lev = levelCurrent | levelNext << 16;
if (visibleChars == 0 && options.foldCompact)
lev |= SC_FOLDLEVELWHITEFLAG;
if (levelCurrent < levelNext)
lev |= SC_FOLDLEVELHEADERFLAG;
if (lev != styler.LevelAt(lineCurrent)) {
styler.SetLevel(lineCurrent, lev);
}
lineCurrent++;
lineStartNext = styler.LineStart(lineCurrent+1);
levelCurrent = levelNext;
if (atEOL && (i == static_cast<Sci_PositionU>(styler.Length()-1))) {
// There is an empty line at end of file so give it same level and empty
styler.SetLevel(lineCurrent, (levelCurrent | levelCurrent << 16) | SC_FOLDLEVELWHITEFLAG);
}
visibleChars = 0;
}
}
}
LexerModule lmProgress(SCLEX_PROGRESS, LexerABL::LexerFactoryABL, "abl", ablWordLists);
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